HeatTrak HR-PB Power Unit, 240V, 6 Foot Cord (Discontinued by Manufacturer) Required for powering 240-volt industrial stair mats Watertight connectors allow for a safe connection in outdoor conditions Designed to be left outside for the entire winter season Connect up to 15 amps on a single power unit 6 foot cord; includes inline ELCI (Equipment Leakage Circuit Interrupter)